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POST
/
v1
/
users
/
themes
Create a new theme
curl --request POST \
  --url https://api.yalg.ai/v1/users/themes \
  --header 'Content-Type: application/json' \
  --header 'x-api-key: <api-key>' \
  --data '
{
  "name": "Founder voice"
}
'
{
  "id": "018f9f46-9a0e-7afd-b13f-2f63f07aa4f2",
  "name": "Founder voice",
  "description": "Direct, practical, and story-led.",
  "isDefault": false,
  "config": {
    "tone": "direct",
    "pacing": "concise"
  },
  "createdAt": "2026-06-20T17:24:39.000Z",
  "updatedAt": "2026-06-20T17:24:39.000Z"
}

Authorizations

​
x-api-key
string
header
default:yalg_live_your_api_key
required

YALG Developer API key. Send it in the x-api-key header from a server-side environment only.

Body

application/json
​
name
string
required

Name of the theme

Example:

"My Custom Theme"

​
colors
object
required

Color palette configuration

​
typography
object
required

Typography configuration

​
styling
object
required

Styling options configuration

​
isDefault
boolean
default:false

Set as default theme

Response

Theme created successfully

Reusable YALG writing style theme.

​
id
string<uuid>

Theme identifier.

Example:

"018f9f40-7d7b-7712-9b0f-2e5d9fd5df3f"

​
name
string
Example:

"Founder voice"

​
description
string
Example:

"Opinionated and direct"

​
isDefault
boolean
Example:

false

​
config
object
​
createdAt
string<date-time>
Example:

"2026-06-20T17:24:39.000Z"

​
updatedAt
string<date-time>
Example:

"2026-06-20T17:24:39.000Z"